Cut into portion of garage pitched roof to make a deck.
I have a pretty simple cape with an attached garage. I want to cut into the garage roof and remove the rafters for half the sloped roof, add a sliding door and create a deck out of the space. Has anybody seen this done before? Are there any gotchas you can think of? I already figured I would do the following.
*Cut into the south side of the roof's rafters and reinforce the existing sloped roof portion on the south side.
*Pitch the flat portion the roof for drainage.
*Install 3/4" plywood (deck subfloor).
*Install a vinyl waterproof membrane.
*Install sliding door
I'm wondering if this will severely weaken the portion of sloped roof remaining and how to best reinforce. Or perhaps this is a really bad idea?
It would be great to have another way to get outside from the second floor. I'd really like to make a deck there.
you may want to edit your profile to include you location. this sometimes help in providing answers to questions. I could not view your photo.
what you propose is not difficult if done properly. this involves more than just cutting off a roof and throwing down a deck. I'd recommend hiring a professional engineer to design the structure for you. as you stated the remaining roof must be supported. one way of doing this is by installation of a ridge beam. depending on your ground snow loads and location you'll have to account for these loads on your deck and must determine how to support the deck. a lot of structural design would be required for this type of project.
now the simple question, why would you want a deck over your garage when you could built a deck next to your garage? don't have to worry with water getting into your garage. you could add a dormer if you need access from the area above the garage. It would be a lot simpler in my opinion to add a deck next to the garage than ripping your garage apart. does that make sense?
"You get what you pay for, and sometimes free costs more!"